PARPORT_FIND_BASE(9) Parallel Port Devices PARPORT_FIND_BASE(9)NAME
parport_find_base - find a parallel port by base address
struct parport * parport_find_base(unsigned long base);
base I/O address
This returns the parallel port with the specified base address, or NULL if there is none.
There is an implicit parport_get_port done already; to throw away the reference to the port that parport_find_base gives you, use
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 PARPORT_FIND_BASE(9)
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PARPORT_REGISTER_POR(9) Parallel Port Devices PARPORT_REGISTER_POR(9)NAME
parport_register_port - register a parallel port
struct parport * parport_register_port(unsigned long base, int irq, int dma, struct parport_operations * ops);
base I/O address
pointer to the port driver's port operations structure
When a parallel port (lowlevel) driver finds a port that should be made available to parallel port device drivers, it should call
parport_register_port. The base, irq, and dma parameters are for the convenience of port drivers, and for ports where they aren't
meaningful needn't be set to anything special. They can be altered afterwards by adjusting the relevant members of the parport structure
that is returned and represents the port. They should not be tampered with after calling parport_announce_port, however.
If there are parallel port device drivers in the system that have registered themselves using parport_register_driver, they are not told
about the port at this time; that is done by parport_announce_port.
The ops structure is allocated by the caller, and must not be deallocated before calling parport_remove_port.
If there is no memory to allocate a new parport structure, this function will return NULL.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 PARPORT_REGISTER_POR(9)
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